Real-Life Math -- Solution
You're trying to determine how many compressed files you'll have
to make, keeping in mind that each file can be no larger than 10 megabytes.
Each
compressed photo is 3/4 of a megabyte, or 0.75 megabytes.
You'll need
to divide 10 by 0.75 to determine the number of photos that will fit into
one compressed file:
10 / 0.75 = 13.33 (or 13 whole
photos)
Therefore, 0.75 X 13 = 9.75 (you can fit 13 photos in
a compressed file that will be 9.75 megabytes)
Next,
you'll need to divide 210 photos by 13 to see how many compressed files there
will be:
210/13 = 16.15 (16 compressed files with
13 photos each and 1 compressed file with 2 photos)
You
can fit 13 photos in a compressed file that is only 9.75 megabytes. Each compressed
photo is 3/4 of a megabyte (or 0.75 of a megabyte). Uncompressed, each photo
is 2.5 megabytes, so this is quite a space saver.
You will have to
make 17 zip files. 16 files will contain the full 13 photos, and the last
file will contain only 2 photos.
The person on the other end can "unzip"
the files, and the photos will be back to their regular size!
"Numbers
play a pivotal role in photography," says freelance photographer Jesse Winter
Heading. "From balancing exposures by manipulating ISO with shutter speed
and aperture to achieve the same exposure with different results, to setting
up your lighting ratios and ensuring that your rim or hair light is doing
what you're wanting it to do -- before you even look at the back
of your camera."